Weird $2 Canadian Coin?

I found this strangely marked coin in my change and I’m wondering if this was a mint error or if someone has defaced this coin… here is an image of it:

http://i38.photobucket.com/albums/e115/yarcofin/coinerror.jpg

On the back there is also a little bit of a curved clip on the core, but it doesn’t seem to be visible in this picture.

I’ve already checked this website http://members.allstream.net/~err/ but it doesn’t seem to be listed as a known error.
I know what a Toonie is, I’m Canadian…. I mean the perfectly round giant scratch on the front side.